CN104579062B - Low voltage generator black starting-up excitation unit - Google Patents
Low voltage generator black starting-up excitation unit Download PDFInfo
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- CN104579062B CN104579062B CN201410739033.8A CN201410739033A CN104579062B CN 104579062 B CN104579062 B CN 104579062B CN 201410739033 A CN201410739033 A CN 201410739033A CN 104579062 B CN104579062 B CN 104579062B
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- unit
- excitation
- current
- voltage
- black starting
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/08—Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
Abstract
The present invention relates to excitation unit technical field, and in particular to a kind of low voltage generator black starting-up excitation unit.The excitation unit of the present invention provides initial excitation electric current for electromotor due to being provided with the excitation module with black starting-up function, the self-starting in the case of entirely without electricity；The excitation unit of the present invention produces control signal by the running status such as the voltage of electromotor, electric current, frequency index due to being provided with control module and fully controlled bridge power model, and fully controlled bridge power model exports suitable exciting current, maintains the extreme voltage of electromotor.
Description
Technical field
The present invention relates to excitation unit technical field, and in particular to a kind of low voltage generator black starting-up excitation unit.
Background technology
Present excitation unit is designed mainly for the generator system of power system standard configuration, concerned countries standard
Excitation unit based on standard type generating set and formulate, as low-tension unit, especially rural area low pressure small power station, there is no or very
The rare excitation unit to this special design.
The generating plant stand of power system standard configuration, configures reliable direct current（Accumulator）Power-supply system and station-service exchange
Power-supply system, for the remote mountain areas small hydropower station for much not possessing above-mentioned condition, due to not possessing for power supply basic condition,
The application of Microcomputer control technology is not also popularized very much, more than using manually, analogue technique realizing simple control, exist and send out
Motor black starting-up demand, Manual operation link are more, and potential safety hazard is big, situations such as job insecurity.
Black starting-up technology based on mains breakdown is in the existing various ways of power system and prediction scheme, but is all based on big-and-middle-sized
Power station unit is started or is started by diesel engine unit, is set up electrical network primary power, then is gradually recovered each station service of electrical network, gradually opens
Dynamic generating set, recovers the pattern that bulk power grid normally runs.And for the unit of small hydropower station and remote isolated power grid
Black starting-up problem, the research for the excitation unit of such unit itself are little, or user can only face increase investment, match somebody with somebody
Reliable supply unit is put, or the circumstances of simple analog excitation unit can only be selected.
Microcomputer brushless excitation currently for low-tension unit has compared many, but is in terms of miniaturization and low price two mostly
Consider, and be still based on the consideration of standard generator group excitation, it is impossible to such generator is met without electric black starting-up, voltage wave
It is dynamic big, have that reactive power fluctuation is big, set steady is poor, the high special operation condition of load impact rate thus results in the type generating set
Fluctuation of service, disorderly closedown rate are high, simultaneously because the defencive function configured by the type unit is weak, have both affected the effect that generates electricity
Rate, threatens the safety of generating set again.
Due to belonging to such generator, remote mountain areas are miniature and small hydropower station more, and unit capacity is all little, typically exists
Between 80KW～1000KW, the economy of scale and configuration from investment considers that the price of the excitation unit for being configured all compares
It is low, based on the consideration of price and cost of serving, in prior art, lack such device, so as to cause such device in prior art
Performance all than relatively low, all use only the simplification and low configuration of standard generator excitation unit, specific aim miscellaneous function is few,
The requirement of such user's stable operation cannot actually be met.
The content of the invention
Present invention aims to the drawbacks described above of prior art, proposes a kind of low voltage generator black starting-up excitation dress
Put.
Technical scheme includes a kind of low voltage generator black starting-up excitation unit, including：
The excitation module being connected with generator unit stator end by uncontrollable rectifier unit, the excitation module are configured to stopping
Self-starting is carried out under electricity condition and initial excitation electric current is provided for electromotor；
Control module, the control module include detecting that the voltage detection unit of generator output end voltage, detection generate electricity
The current detecting unit of the output current of machine, the exciting current detector unit of the rotor field coil electric current of detection electromotor and core
Heart control unit, the key control unit are configured to be run according to the output end voltage, output current, exciting current
State analysiss simultaneously produce a control signal；
The fully controlled bridge power model being connected with generator unit stator end, the fully controlled bridge power model are configured to according to control
The control signal of module produces operation exciting current and exports to Exciting Windings for Transverse Differential Protection；
And
The switch unit being connected with Exciting Windings for Transverse Differential Protection, the switch unit are configured to the initial excitation electricity in excitation module
Stream, and the operation exciting current of fully controlled bridge power model between switch over.
Preferably, the excitation module includes：
The black starting-up unit of exciting current is provided using the set end voltage of electromotor；
The excessively stream limiting unit being connected with black starting-up unit；
The over-current protecting unit being connected with excessively stream limiting unit and switch unit.
Preferably, the black starting-up unit includes critesistor and hot safety element.
Preferably, the control module also includes：
System voltage detector unit, for detecting electrical network rated voltage, and testing result is sent to key control unit；
Testing result for detecting electromotor synchronizing signal, and is sent single to core control by synchronous signal detection unit
Unit；
Testing result for detecting generator voltage output frequency, and is sent single to core control by frequency detecting unit
Unit.
Preferably, the control module also includes：
Switching value unit, for detecting the switching value of electromotor, and testing result is sent to key control unit；
Signal output unit, including the trigger follower for output control signal, the arteries and veins for producing spike train
Rush row generator.
Preferably, the signal output unit also includes power isolated amplifier.
Preferably, the voltage detection unit includes being sequentially connected voltage-current converter circuit, isolated converters, electric current
Voltage conversion circuit, Wen's filter circuit, bias amplifier and limit filtration circuit.
Preferably, the frequency detecting unit includes the Wen's filter circuit being connected with each other and comparator circuit.
Preferably, the fully controlled bridge power model includes：
Be connected with generator unit stator, the exciting transformer for providing field power supply；
It is connected, runs for generation the fully controlled SCR of exciting current with control module and switch unit.
Preferably, the key control unit includes signal conversion subunit and Digital Signal Processing subelement, the letter
Number conversion subunit is configured to for voltage, current analog signal to be converted into digital signal, and the digital signal subelement is matched somebody with somebody
Is set to and digital signal is carried out running state analysis and produce control signal.
Compared with prior art, beneficial effects of the present invention include：The excitation unit of the present invention is due to being provided with black
The excitation module of startup function, the self-starting in the case of entirely without electricity provide initial excitation electric current for electromotor；The present invention's
Excitation unit runs shape by the voltage of electromotor, electric current, frequency etc. due to being provided with control module and fully controlled bridge power model
State index produces control signal, and fully controlled bridge power model exports suitable exciting current, maintains the extreme voltage of electromotor.
Description of the drawings
Fig. 1 is the structured flowchart of the excitation unit of the embodiment of the present invention 1.
Fig. 2 be the embodiment of the present invention 1 excitation unit in control module structured flowchart.
Fig. 3 be the embodiment of the present invention 1 excitation unit in voltage detection unit circuit diagram.
Fig. 4 is the circuit diagram of the excitation unit medium frequency detector unit of the embodiment of the present invention 1.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The invention provides a kind of low voltage generator black starting-up excitation unit, compared with prior art, its difference exists
In the device includes：
The excitation module being connected with generator unit stator end by uncontrollable rectifier unit, the excitation module are configured to stopping
Self-starting is carried out under electricity condition and initial excitation electric current is provided for electromotor；
Control module, the control module include detecting that the voltage detection unit of generator output end voltage, detection generate electricity
The current detecting unit of the output current of machine, the exciting current detector unit of the rotor field coil electric current of detection electromotor and core
Heart control unit, the key control unit are configured to be run according to the output end voltage, output current, exciting current
State analysiss simultaneously produce a control signal；
The fully controlled bridge power model being connected with generator unit stator end, the fully controlled bridge power model are configured to according to control
The control signal of module produce operation and exciting current export to Exciting Windings for Transverse Differential Protection；
And
The switch unit being connected with Exciting Windings for Transverse Differential Protection, the switch unit are configured to the initial excitation electricity in excitation module
Stream, and the operation exciting current of fully controlled bridge power model between switch over.
Specifically, above-mentioned excitation unit is due to being provided with the excitation module with black starting-up function, entirely without electricity
In the case of self-starting, provide initial excitation electric current for electromotor；Above-mentioned excitation unit is due to being provided with control module and full control
Bridge power model, produces control signal, fully controlled bridge power mould by the running status such as the voltage of electromotor, electric current, frequency index
Block exports suitable exciting current, maintains the extreme voltage of electromotor.
Embodiment 1：
Embodiments of the invention 1 provide a kind of low voltage generator black starting-up excitation unit, refer to shown in Fig. 1, and this is encouraged
Magnetic device includes：Excitation module 1, control module 2, fully controlled bridge power model 3 and switch unit 4, wherein, excitation module 1 passes through
Uncontrollable rectifier unit 5 is connected with generator unit stator end, and excitation module 1 is configured to self-starting be carried out under power down mode and to send out
Motor provides initial excitation electric current；Control module 2 includes voltage detection unit 21, the detection of current detecting unit 22, exciting current
Unit 23 and key control unit 24, the detection generator output end voltage of voltage detection unit 21, current detecting unit 22 are detected
The output current of electromotor, exciting current detector unit 23 detect the rotor field coil electric current of electromotor, key control unit
24 are configured to carry out running state analysis according to the output end voltage, output current, exciting current and produce a control signal；
Fully controlled bridge power model 3 is connected with generator unit stator end, and fully controlled bridge power model 3 is configured to the control according to control module 2
Signal produces operation exciting current and exports to Exciting Windings for Transverse Differential Protection；Switch unit 4 is connected with Exciting Windings for Transverse Differential Protection, and switch unit 4 is configured
It is to switch between the operation exciting current of the initial excitation electric current and fully controlled bridge power model 3 of excitation module 1.Entirely
Control bridge power model 3 includes exciting transformer 31 and fully controlled SCR 32, wherein, exciting transformer 31 is connected with generator unit stator
Connect, for providing field power supply；Fully controlled SCR 32 is connected with control module 2 and switch unit 4, runs excitation for producing
Electric current.
Please continue to refer to shown in Fig. 1, used as a preferred version, excitation module 1 includes：Black starting-up unit 11, excessively ductility limit
Unit processed 12 and over-current protecting unit 13, wherein, black starting-up unit 11 provides exciting current, mistake using the set end voltage of electromotor
Stream limiting unit 12 is connected with black starting-up unit, and over-current protecting unit 13 is connected with excessively stream limiting unit 12 and switch unit 4.It is black
Start unit 11 includes critesistor and hot safety element.
Refer to shown in Fig. 2, control module 2 also includes system voltage detector unit 25, synchronous signal detection unit 26, frequency
Rate detector unit 27, switching value unit 28 and signal output unit 29；System voltage detector unit 25 is used to detect electrical network
Rated voltage, and testing result is sent to key control unit 24；Synchronous signal detection unit 26 is used to detect that electromotor is same
Step signal, and testing result is sent to key control unit 24；Frequency detecting unit 27 is used to detect that generator voltage is exported
Frequency, and testing result is sent to key control unit 24；Switching value unit 28 is used for the switching value for detecting electromotor,
And testing result is sent to key control unit 24；Signal output unit 29 includes the trigger for output control signal
Follower 291, the pulse train generator 292 for producing spike train, and power isolated amplifier 293.
Refer to shown in Fig. 3, voltage detection unit 21 includes that the voltage-current converter circuit 211 being sequentially connected, isolation become
Stream device 212, current-to-voltage converting circuit 213, Wen's filter circuit 214, bias amplifier 215 and limit filtration circuit 216.
Refer to shown in Fig. 4, frequency detecting unit 27 includes the Wen's filter circuit 271 being connected with each other and comparator circuit
272。
R1 ~ R14 is the measuring resistance of 0.5% precision, is calculated according to the parameter of input voltage and is chosen.
C1 ~ C3 is the Standard patch electric capacity of 5% precision.
T1 is standard current transformer, and the present invention is using model DVDI-10.
OMP1 is standard operational amplifier, and the present invention adopts model LM124.
In addition, key control unit 24 includes signal conversion subunit and Digital Signal Processing subelement, the signal turns
Change subelement to be configured to for voltage, current analog signal to be converted into digital signal, the digital signal subelement is configured to
Running state analysis are carried out to digital signal and control signal is produced.The excitation unit is also included for showing generator operation shape
The digital circulation display unit of state.
The excitation unit of the present embodiment in the case of entirely without electricity is coordinated using temperature-sensitive technology and linear resistance, is constituted
Self-adaptation type starting-up later time, after question generator is close to rated speed, with generator residual pressure as power supply, provides starting to electromotor
Exciting current, makes electromotor generator terminal export higher voltage（>30%）, for excitation unit normal work.
Control module plays microcomputer excitation control action, is higher than certain value in set end voltage（30%）Afterwards, control power supply normal
Work, control module normal work judge current motor status and control instruction（Voltage, frequency, startup excitation con-trol instruction
Deng）, the control pulse required for fully controlled SCR being sent, makes fully controlled SCR put into normal work, black starting-up unit is certainly
Dynamic to exit, excitation con-trol unit regulator generator voltage is to desired value immediately or arrives Light Condition, completes electromotor black starting-up.
When electromotor load carrying, the frequency of real-time monitoring electromotor, it is higher than generated output power when there is load
Cause frequency to reduce, or load causes frequency to raise less than generated output power, carry out intelligence frequency pressure compensation, it is negative by adjustment
Lotus carrys out the output frequency of stable generator, realizes the stable operation of generating set.
Key control unit with DSP as excitation unit, using AC sampling, Adaptive PID Control technology, sets up letter
Clean, reliable, necessary electromotor is limited and defencive function, to realize the generating set safe and highly efficient operation under adverse circumstances.
The intelligence switching of constant pressure, the various methods of operation of permanent idle, constant power factor, to realize generating set Effec-tive Function,
Also ensure that little net simultaneously（Isolated network）Safe operation.
It is intuitively digital to circulate display unit, there is provided the display directly perceived under the adverse circumstances such as hypermetropia angle, low illumination.
The specific embodiment of present invention described above, does not constitute limiting the scope of the present invention.Any basis
Various other corresponding change and deformation that the technology design of the present invention is made, should be included in the guarantor of the claims in the present invention
In the range of shield.
Claims (7)
1. a kind of low voltage generator black starting-up excitation unit, it is characterised in that the device includes：
The excitation module being connected with generator unit stator end by uncontrollable rectifier unit, the excitation module are configured in power failure shape
Self-starting is carried out under state and initial excitation electric current is provided for electromotor；
Control module, the control module include detecting the voltage detection unit of generator output end voltage, detect electromotor
The current detecting unit of output current, the exciting current detector unit of the rotor field coil electric current of detection electromotor and core control
Unit processed, the key control unit are configured to carry out running status according to the output end voltage, output current, exciting current
Analyze and produce a control signal；
The fully controlled bridge power model being connected with generator unit stator end, the fully controlled bridge power model are configured to according to control module
Control signal produce operation and exciting current export to Exciting Windings for Transverse Differential Protection；
And
The switch unit being connected with Exciting Windings for Transverse Differential Protection, the switch unit be configured to excitation module initial excitation electric current, with
And switch between the operation exciting current of fully controlled bridge power model；
Wherein, the excitation module includes：
The black starting-up unit of exciting current is provided using the set end voltage of electromotor；
The excessively stream limiting unit being connected with black starting-up unit；
The over-current protecting unit being connected with excessively stream limiting unit and switch unit.
2. low voltage generator black starting-up excitation unit according to claim 1, it is characterised in that the black starting-up unit bag
Include critesistor and hot safety element.
3. low voltage generator black starting-up excitation unit according to claim 1, it is characterised in that the control module is also wrapped
Include：
System voltage detector unit, for detecting electrical network rated voltage, and testing result is sent to key control unit；
Synchronous signal detection unit, for detecting electromotor synchronizing signal, and testing result is sent to key control unit；
Frequency detecting unit, for detecting generator voltage output frequency, and testing result is sent to key control unit.
4. low voltage generator black starting-up excitation unit according to claim 3, it is characterised in that the control module is also wrapped
Include：
Switching value unit, for detecting the switching value of electromotor, and testing result is sent to key control unit；
Signal output unit, including the trigger follower for output control signal, the spike train for producing spike train
Generator.
5. low voltage generator black starting-up excitation unit according to claim 4, it is characterised in that the signal output unit
Also include power isolated amplifier.
6. low voltage generator black starting-up excitation unit according to claim 1, it is characterised in that the voltage detection unit
Including the voltage-current converter circuit, isolated converters, current-to-voltage converting circuit, Wen's filter circuit, biasing that are sequentially connected
Amplifying circuit and limit filtration circuit.
7. low voltage generator black starting-up excitation unit according to claim 3, it is characterised in that the frequency detecting unit
Including the Wen's filter circuit and comparator circuit that are connected with each other.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739033.8A CN104579062B (en) | 2014-12-08 | 2014-12-08 | Low voltage generator black starting-up excitation unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739033.8A CN104579062B (en) | 2014-12-08 | 2014-12-08 | Low voltage generator black starting-up excitation unit |
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| CN104579062A CN104579062A (en) | 2015-04-29 |
| CN104579062B true CN104579062B (en) | 2017-04-05 |
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| CN201410739033.8A Active CN104579062B (en) | 2014-12-08 | 2014-12-08 | Low voltage generator black starting-up excitation unit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024603B (en) * | 2015-07-20 | 2018-08-28 | 天津市明硕科技发展有限责任公司 | A kind of black excitation circuit of brushless excitation |
| CN109861170B (en) * | 2019-03-29 | 2020-07-31 | 岭澳核电有限公司 | Nuclear power station combined voltage overcurrent protection device and generator protection system |
| CN112910339B (en) * | 2020-11-19 | 2022-06-28 | 西安热工研究院有限公司 | Black-start manual excitation tape line generator voltage control value acquisition device and method |
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| CN101290342A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units black start-up ability verification test method |
| CN202059365U (en) * | 2011-05-05 | 2011-11-30 | 武汉科创源科技有限公司 | Multi-parameter self-adaptive TRT excitation control device |
| CN202931245U (en) * | 2012-11-28 | 2013-05-08 | 南宁亿通电气有限公司 | Synchronous generator microcomputer exciting arrangement base on ARM processor and PLC |
| CN203056682U (en) * | 2012-12-03 | 2013-07-10 | 浙江中高动力科技股份有限公司 | Power plant black-start special-purpose diesel generating set and control system thereof |
| CN103746622A (en) * | 2014-01-23 | 2014-04-23 | 东北大学 | Single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and power control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4548469B2 (en) * | 2007-10-12 | 2010-09-22 | 株式会社デンソー | Vehicle power generation control device |
| JP5376199B2 (en) * | 2008-06-10 | 2013-12-25 | 株式会社Ｉｈｉ | Flywheel uninterruptible power supply and control method thereof |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290342A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units black start-up ability verification test method |
| CN202059365U (en) * | 2011-05-05 | 2011-11-30 | 武汉科创源科技有限公司 | Multi-parameter self-adaptive TRT excitation control device |
| CN202931245U (en) * | 2012-11-28 | 2013-05-08 | 南宁亿通电气有限公司 | Synchronous generator microcomputer exciting arrangement base on ARM processor and PLC |
| CN203056682U (en) * | 2012-12-03 | 2013-07-10 | 浙江中高动力科技股份有限公司 | Power plant black-start special-purpose diesel generating set and control system thereof |
| CN103746622A (en) * | 2014-01-23 | 2014-04-23 | 东北大学 | Single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and power control method |
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| CN104579062A (en) | 2015-04-29 |
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